It sounds like 2.2.x is relying on BIOS setup of PCI
space even for the
Of course, the direct mode modifies only the way of accessing the
configuration registers, not how does the kernel interpret their
2.3.x might do better, but only for resources (and only in simple
cases -- it doesn't know how to allocate space to bus bridges if the
BIOS forgets to do it), not for IRQ's.
It is likely that 2.3.x needs this as well to some
extent, but I can
almost promise you that 2.3.x will behave more sanely when faced with
the lack of BIOS setup... The 2.3.x kernel PCI code has a ton of
fixup-handling code already, which would be very similar to handling the
completely-lack-of-BIOS case. It shouldn't be very hard at all to get
the PCI code completely independent of BIOS PCI setup -- if that hasn't
happened already, that is.
If you want, I can look at the OpenBIOS and write some PCI setup
code for it.
Have a nice fortnight
Martin `MJ' Mares <mj(a)ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"hAS ANYONE SEEN MY cAPSLOCK KEY?"
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